excel VBA run macro automatically whenever a cell is changed

Question

Is there a simple way to get Excel to automatically execute a macro whenever a cell is changed?

The cell in question would be in Worksheet(\"BigBoard\").Range(

Answer 1

Another option is

Private Sub Worksheet_Change(ByVal Target As Range)
    IF Target.Address = "$D$2" Then
        MsgBox("Cell D2 Has Changed.")
    End If
End Sub

I believe this uses fewer resources than Intersect, which will be helpful if your worksheet changes a lot.